3003816
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Intact Fibroblast Growth Factor 23 (FGF23), Serum

IFGF23
Example Reports
Abnormal
Normal

Ordering Recommendation

May assist in the evaluation of inherited or acquired disorders of mineral metabolism such as hypophosphatemia rickets, tumor-induced osteomalacia, and familial tumoral calcinosis with hyperphosphatemia.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation
Collect

Serum Separator Tube (SST). Also acceptable: Plain red.

Specimen Preparation

Transfer 0.5 mL serum to an ARUP Standard Transport Tube. (Min: 0.25 mL)
Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.

Storage/Transport Temperature

Frozen. Also acceptable: Refrigerated.

Unacceptable Conditions
Remarks
Stability

Ambient: Unacceptable; Refrigerated: 2 weeks; Frozen: 3 months

Methodology

Quantitative Chemiluminescent Immunoassay

Performed

Varies

Reported

3-10 days

Reference Interval

By Report

Interpretive Data



Compliance Category

Performed by non-ARUP Laboratory

Note

Hotline History

N/A

CPT Codes

83520

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Components

Component Test Code* Component Chart Name LOINC
3003817 Intact Fibroblast Growth Factor 23 54390-0
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • Autosomal Dominant Hypophosphatemic Rickets
  • Familial Tumoral Calcinosis with Hyperphosphatemia
  • FGF23
  • Intact-FGF23
  • Oncogenic Osteomalacia
  • Phosphatonin
  • X-linked Hypophosphatemia
Intact Fibroblast Growth Factor 23 (FGF23), Serum

Mayo Clinic Laboratories